Table 4.

Factors predicting an optimal surgical outcome (final recovery rate greater than 50%¹⁶).

Predictor	Odds ratio	95% Confidence interval	Statistical significance
Gait impairment	1.94	0.19–19.88	p = 0.58
Smoking	0.71	0.09–5.50	p = 0.74
Age	0.98	0.86–1.09	p = 0.59
Symptom duration	0.83	0.59–1.16	p = 0.27
Preoperative JOA	2.77	1.05–7.29	p = 0.04

Predictors assessed according to the study by AOSpine group¹⁷.

JOA Japanese Orthopaedic Association score.